Turns out that if you have a QMainWindow containing a QWindow (e.g. by using QWidget::createWindowContainer()):
- if you call QMainWindow::close(), the QWindow receives QEvent::Hide and does the right thing - if you click the close button in the title bar, the QWindow receives QEvent::Close which calls QWindow::destroy() This is not what I would expect. Is this by design? The QWidget::createWindowContainer docs don't mention this as a limitation. I haven't yet found a way around it, so suggestions appreciated. --- Andy Maloney // https://asmaloney.com twitter ~ @asmaloney <https://twitter.com/asmaloney> On Tue, Oct 30, 2018 at 7:24 AM Andy <asmalo...@gmail.com> wrote: > *Setup:* > > - two QMainWindows - "main" and "viewer" > - "viewer" uses Qt3D via QWidget::createWindowContainer() > - shortcut "cmd-w" (Qt::ApplicationShortcut) set up to call close() on > "viewer" if it is the activeWindow() > - "viewer" does not have WA_DeleteOnClose set, so the window is only hidden > > *Problem:* > > - if I close the viewer via the shortcut and reopen it, the 3D view is fine > - if I close it via the close button in the title bar (macOS or Windows) > and reopen it, the 3D view is blank > > Any idea why my 3D view is getting killed in the second case? > > This may be a red-herring, but I've traced both through to > QWidgetPrivate::close_helper() and each is called with a different mode. > The first is called with "CloseWithEvent" and the second with > "CloseWithSpontaneousEvent". Could this be a factor? > > I have another window which uses a QGraphicsView set up exactly the same > way and it works fine, so maybe Qt3D is doing something I'm not expecting > based on a CloseWithSpontaneousEvent? > > Thanks for any ideas/suggestions. > > --- > Andy Maloney // https://asmaloney.com > twitter ~ @asmaloney <https://twitter.com/asmaloney> > >
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